I am trying to remove the green screen background. I am able to remove it but there looks like wiggling lines around the outside of the person after the green screen is removed. What causes this and how do I fix it. I shot the footage on HDV cassette. Could this be an issue with quality of the footage. I have tried messing around with the effects and settings in keylight but to no avail. Any help would be appreciated.

+1 to everything Dave said. Keying is an art, not something you do en passant. It requires proper preparation just as it may require additional steps. HDV is certainly not ideal, but not impossible, eitehr. Without some screenshot or something, nobody wil be able to give specific advise, though.

Thanks for the input. This is more of a hobby thing that I am just learning. I am quite new to after effects and lighting. I agree that the quality of the HDV footage is not the best. It almost seems like shooting video off my iPhone has better quality. Is there something I can read on proper lighting practice so I can give it another go? I have been trying different things with Keying and it seems that things are getting better each time. I just need to make sure that I am not doing this all in vain because the quality of the video is too lousy. I don't really know what you mean by using Keying intuitively. Can you please explain more? I can tell you that the color balance is off but that could be a lighting issue and the resolution of the video doesn't seem to be the best. I have attached a screen shot for review. Again I am just getting started at this but have a genuine interest in becoming great at it. So, please be gentle . If there is anything else I should take into consideration and should read up on please point me in the right direction. Thanks again for your help.

And I have to be frank: from the looks of that window grab, you need help lighting for green screen. Hot spots on the green screen make life very difficult. More light needs to fall on the subject than on the background. The subject needs to be placed away from the background: a good six feet for starters, to reduce a nasty phenomenon called light spill, which is when the color of the background reflects on the subject.

And don't forget: if you can't get useful lighting instruments, Mr. Sun can be your friend: angle the screen so it's in shadow, add fill light & back light to the subject with reflectors, and you're well on your way to good lighting.

The Creative Cow site that Dave has suggested is really worth the time. the 4-part green screen tutorials are easy to understand, yet highly detailed. It also points you to a very good site that can be used to practice your keying on.

You are lucky to be doing this as a hobby! :-) I have joined a company and the green screen effect is 90% of what we need to do, and I am the After Effects guy - well, i hope to be after a few more months of training, reading and tutorials!

Ok thanks for all the information. I have one more question and that would be what kind of camera would be recommended for this type of application and to get the best results without having to sell my house :).

You still need to become adept at lighting & shooting for chroma key, which will improve your results significantly. You still need to understand that pulling a good key is rarely a "one click and I'm done" deal: sometimes it can be a very complex process, with multiple layers, animated masks and rotoscoping. Shooting a subject from head to toe, a subject with wispy hair and see-through objects are particularly aggravating.

I'd say you should learn how to pull an acceptable key with what you have first, and save those nickels & dimes. You might discover you get results that work for you.

If you just can't wait, look at a Panasonic camera that shoots to P2 cards and records in DVPro HD or AVC Intra, not AVCHD. They're probably the most affordable cameras out there with good color resolution for chroma keying. Please don't let all the blood drain from your face when you look at the price tag.

So what about the price tags on the BEST cameras for shooting chroma keys? Depending you your needs, they can vary in price from an entry-level Mercedes to a totally tricked-out Corvette. Lenses, filters, viewfinders, matte boxes, and audio & video recording devices are extra.

If you just can't wait, look at a Panasonic camera that shoots to P2 cards and records in DVPro HD or AVC Intra, not AVCHD. They're probably the most affordable cameras out there with good color resolution for chroma keying. Please don't let all the blood drain from your face when you look at the price tag.

Well, THAT'S wrong: I meant to write DVCPro HD, and not DVPro HD.

A search for that fictional DVPro HD would either lead no place, or worse still, someplace bad.

Thanks for all your help and advice. That goes for everyone who had some direction. I will definitely start working on my lighting skills and then work my way into better camera equipment in the future.